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Impact toughness of high strength low alloy TMT reinforcement ribbed bar

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Abstract

Charpy V-notch impact toughness of 600 MPa yield stress TMT rebars alloyed with copper, phosphorus, chromium and molybdenum has been evaluated. Subsize Charpy specimens were machined from the rebar keeping the tempered martensite rim intact. The copper-phosphorus rebar showed toughness of 35 J at room temperature. The toughness of copper-molybdenum and copper-chromium rebars was 52 J. The lower toughness of phosphorus steel is attributed to solid solution strengthening and segregation of phosphorus to grain boundaries. Due to superior corrosion resistance, copper-phosphorus TMT rebar is a candidate material in the construction sector.

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Authors and Affiliations

  1. R&D Centre for Iron and Steel, Steel Authority of India Limited, 834 002, Ranchi, India

    Bimal Kumar Panigrahi & Surendra Kumar Jain

  2. †Steel Authority of India Ltd., Bhilai Steel Plant, 490 001, Bhilai, India

    Surendra Kumar Jain

Authors
  1. Bimal Kumar Panigrahi
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  2. Surendra Kumar Jain
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Panigrahi, B.K., Jain, S.K. Impact toughness of high strength low alloy TMT reinforcement ribbed bar. Bull Mater Sci 25, 319–324 (2002). https://doi.org/10.1007/BF02704125

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  • DOI: https://doi.org/10.1007/BF02704125

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